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    use super::{ArrayLength, GenericArray};
    use core::borrow::{Borrow, BorrowMut};
    use core::cmp::Ordering;
    use core::fmt::{self, Debug};
    use core::hash::{Hash, Hasher};
    use functional::*;
    use sequence::*;

    impl<T: Default, N> Default for GenericArray<T, N>
    where
        N: ArrayLength<T>,
    {
        #[inline]
        fn default() -> Self {
            Self::generate(|_| T::default())
        }
    }

    impl<T: Clone, N> Clone for GenericArray<T, N>
    where
        N: ArrayLength<T>,
    {
        fn clone(&self) -> GenericArray<T, N> {
            self.map(|x| x.clone())
        }
    }

    impl<T: Copy, N> Copy for GenericArray<T, N>
    where
        N: ArrayLength<T>,
        N::ArrayType: Copy,
    {
    }

    impl<T: PartialEq, N> PartialEq for GenericArray<T, N>
    where
        N: ArrayLength<T>,
    {
        fn eq(&self, other: &Self) -> bool {
            **self == **other
        }
    }
    impl<T: Eq, N> Eq for GenericArray<T, N>
    where
        N: ArrayLength<T>,
    {
    }

    impl<T: PartialOrd, N> PartialOrd for GenericArray<T, N>
    where
        N: ArrayLength<T>,
    {
        fn partial_cmp(&self, other: &GenericArray<T, N>) -> Option<Ordering> {
            PartialOrd::partial_cmp(self.as_slice(), other.as_slice())
        }
    }

    impl<T: Ord, N> Ord for GenericArray<T, N>
    where
        N: ArrayLength<T>,
    {
        fn cmp(&self, other: &GenericArray<T, N>) -> Ordering {
            Ord::cmp(self.as_slice(), other.as_slice())
        }
    }

    impl<T: Debug, N> Debug for GenericArray<T, N>
    where
        N: ArrayLength<T>,
    {
        fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
            self[..].fmt(fmt)
        }
    }

    impl<T, N> Borrow<[T]> for GenericArray<T, N>
    where
        N: ArrayLength<T>,
    {
        fn borrow(&self) -> &[T] {
            &self[..]
        }
    }

    impl<T, N> BorrowMut<[T]> for GenericArray<T, N>
    where
        N: ArrayLength<T>,
    {
        fn borrow_mut(&mut self) -> &mut [T] {
            &mut self[..]
        }
    }

    impl<T, N> AsRef<[T]> for GenericArray<T, N>
    where
        N: ArrayLength<T>,
    {
        fn as_ref(&self) -> &[T] {
            &self[..]
        }
    }

    impl<T, N> AsMut<[T]> for GenericArray<T, N>
    where
        N: ArrayLength<T>,
    {
        fn as_mut(&mut self) -> &mut [T] {
            &mut self[..]
        }
    }

    impl<T: Hash, N> Hash for GenericArray<T, N>
    where
        N: ArrayLength<T>,
    {
        fn hash<H>(&self, state: &mut H)
        where
            H: Hasher,
        {
            Hash::hash(&self[..], state)
        }
    }

    macro_rules! impl_from {
        ($($n: expr => $ty: ty),*) => {
            $(
                impl<T> From<[T; $n]> for GenericArray<T, $ty> {
                    fn from(arr: [T; $n]) -> Self {
                        use core::mem::{forget, transmute_copy};
                        let x = unsafe { transmute_copy(&arr) };
                        forget(arr);
                        x
                    }
                }
            )*

        }
    }

    impl_from! {
        1  => ::typenum::U1,
        2  => ::typenum::U2,
        3  => ::typenum::U3,
        4  => ::typenum::U4,
        5  => ::typenum::U5,
        6  => ::typenum::U6,
        7  => ::typenum::U7,
        8  => ::typenum::U8,
        9  => ::typenum::U9,
        10 => ::typenum::U10,
        11 => ::typenum::U11,
        12 => ::typenum::U12,
        13 => ::typenum::U13,
        14 => ::typenum::U14,
        15 => ::typenum::U15,
        16 => ::typenum::U16,
        17 => ::typenum::U17,
        18 => ::typenum::U18,
        19 => ::typenum::U19,
        20 => ::typenum::U20,
        21 => ::typenum::U21,
        22 => ::typenum::U22,
        23 => ::typenum::U23,
        24 => ::typenum::U24,
        25 => ::typenum::U25,
        26 => ::typenum::U26,
        27 => ::typenum::U27,
        28 => ::typenum::U28,
        29 => ::typenum::U29,
        30 => ::typenum::U30,
        31 => ::typenum::U31,
        32 => ::typenum::U32
    }

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